SACRAMENTO, CA (AP) -- California gubernatorial candidate Meg Whitman says she has no plans to give at least half her wealth to charity, as 40 of her fellow billionaires have pledged.

On Wednesday, Microsoft Corp. co-founder Bill Gates and billionaire investor Warren Buffett released a list of wealthy families and individuals who have joined their six-week old campaign to give at least half their wealth to charity.

Asked about the pledge, Whitman on Tuesday said she and husband Griffith Harsh have made substantial contributions to their own charitable foundation.

Whitman was ranked 326th on Forbes' list of 400 richest Americans in 2009. The magazine estimated the Republican candidate's wealth at $1.3 billion in March.

Woos Hispanic voters

Whitman has opened a campaign office in East Los Angeles and is airing more Spanish-language television ads in her attempt to attract Hispanic voters.

Whitman said Wednesday her office was the first in 30 years for a Republican candidate in the predominantly Hispanic neighborhood.

She also released a Spanish-language version of her policy book, which she said she would mail to every voter in East L.A.

Whitman's campaign chairman, former Gov. Pete Wilson, was instrumental in the 1994 campaign for Proposition 187, which prohibited illegal immigrants from receiving social services, including schooling. It was later overturned.

Whitman told reporters Wednesday the initiative is "a point of departure between me and Pete Wilson."

About 50 protesters chanted outside the office, which is in a strip mall.